Improvement in the mode of operating the rolls in drawing-frames



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UNITED STATES JOSEPH CHASE, or WORCESTER, AND J. iu. STONE, or NORTHANDovHit,

PATENT OFFICE.

MASSACHUSETTS.

IMPROVEMENT IN THE MODE 0F OPERATING THE ROLLS IN DRAWING-FRAMES.

Specication forming part of Letters Patent No. 42,076, dated March 29,1864.

T0 all whom t may concern:

Be it known that we, JOSEPH CHASE, of the city and county of Worcester,in the State of Massachusetts, and J. M. STONE, of North Andover, in thecounty of Essex and State aforesaid, have invented a new and ImprovedManner of Operating the Rolls in Machines for Treating Slivers of Wool,86e. 5v and we do hereby declare that the following, taken in connectionwith the drawings which accompany and form part of this specification,is a -description of our invention sucient to enable those skilled inthe art to practice it.

Our invention consists in so operating the rolls of a drawing-machine asto temporarily twist together the fibers of the material subjected totheir action during the drawing Vor extending process, by whichoperation the uniform attenuation of the slivers from the cardingengineis better attained than by the simple rolling, compressing, and drawingac' tion of the ordinary drawing-machine, and by which also the fibersof the slivers are arranged more nearly parallel to each other thanheretofore, so that when finally and permanently twisted, the yarn orthread produced is of superior strength and evenness.

In drawing-frames heretofore in use it is well-known thatin the seriesof rolls employed the rolls which discharge the slivers rotate with aconsiderably greater surface velocity than the rolls at which theslivers are received from the card 5 also, that these rolls,beingarranged in what may be termed layers,7 so that the slivers pass betweenthose above and those below, are made to reciprocate, all of the upperlayer moving to the right, while the lower layer reciprocate to theleft, and vice versa,

this movement rotating the slivers first in one direction and then inthe other as they are drawn between the upper and under rolls. Thisrotation, it is probable, aids the compressing and drawing action of therolls, but doesv not temporarily increase the strength of the sliverduring the drawing process as temporary twisting would do, and thesliver, being weak, with little adhesion between the fibers of which itis composed, is easily broken, and is irregularly attenuated.

In our invention, while retaining the drawing operation of the rolls,they are moved by any suitable mechanism, so that throughout so much ofa sliver as is subjected to the drawing action of the rolls there shallbe a twist or torsion, or a series of twists or torsions, first in onedirection and thenv in theother, by which the fibers of the sliver aretwisted upon each other temporarily, by which twist the sliver is sostrengthened as to enable it to bear more rapid attenuation thanheretofore attained in drawing-machines, and with a gain in theuniformity of the product, and with less breakage, while the fibers, bythe combined twisting and untwisting and drawing process, are laid morenearly parallel than they are by mere rolling.

In the drawings, Figure l represents a plan, Fig. 2 an end elevation,and Fig. 3 a side elevation, of a machine embodying our invention.

We have shown the rolls as arranged in two banks or tiers in a suitablesustainingfraine, the upper tier being intended for action on theslivers discharged from the upper part of a card, 'and the lower tier onthose discharged from the lower part. It will be seen that each tier ofrolls is arranged in sets of three, there being an upper roll and twolower rolls in each set, between the bites of which the sliversrepresented in red lines in Fig. 2 pass in the direction of theindicating-arrows at the ends of said lines.

The arrows upon the rolls indicate the direction of their rotation andof their reciprocations. Of these arrows, which indicate reciprocation,those in solid lines show the reciprocation commencing, while those indotted n lines show the direction of the reciprocation which hasterminated. In both the upper and lower tiers are shown three sets ofthree rolls each, each roll of the first or entrance set being marked l,each roll of the middleset 2, and each of the dischargesets 3. It willnow be evident that when the rolls are moved, as indicated, the sliverswill be twisted between sets 1 and 2, and between sets 2 and 3, first inone direction, and then untwisted and twisted in the opposite direction,there being aninstant when the rolls are in the center of theirreciprocations when there is no twist formed in the slivers. It willalso be evident that the slivers are discharged with out receiving anypermanent twist in the machine.

The arrangement and number of rolls may be modified to any extent deemeddesirable Without departure from our invention so long as in that partof the slivers which are snb initted to the drawing or elongating actionthey are temporarily twisted, rst in one dition and then in another, byreciprocations ot' rolls, or their equivalentsendless belts, forexample. Rolls which reciprocate may be intermingled with rolls whichonly rotate, and these may act as mere carriers; or they may take partin the drawing process; or such rolls may do all the drawing, while therotating reciprocating rolls act only as carriers and twisters. None ofthe gearing which rotates the rolls is shown. Any well-known gearing forrotating drawing'frame rolls may be cmployed. Any suitable mechanism maybe used to reciprocate the rolls, that which is shown being as follows:A vertical cranked shaft, a, is made to rotate, and its cranks causemotion of connectingrods b, which work slides c and d, slides creciprocating on ways e, secured t0 the frame-work, and slides (Iremat-mm A ciprocatin g on ways formed in c. The rolls are connected tothese slides by necked jonrnals f in such a manner that the top rolls ofadjacent reciprocating sets of rolls recipro cate in contrarydirections, as also do the bottom rolls of such sets.

The arrangement of rolls is not coniined to sets of three. Sets of twoor any other suitable number will operate well.

Ve claim- So arranging and operating the rolls of a drawing orcondensing machine that the reciprocatin g movements ot' adjacent setsot' rolls shall be in alternate directions, substantially as described.

In testimony whereof we have hereunto set our signatures this 23d day ofNovember, A. D. 1863.

JOSEPH CHASE. J. M. STONE.

Witnesses:

J. B. Cnosnr, l?. GOULD.

